Variable ramp again

[mbartkow at ET.PUT.Poznan.PL]

Paul Perry <pfperry at melbpc.org.au> wrote:

>suppose the frequency is very low (like in a LFO) then if the DC offset is
>removed
>eg by a cap, I think you run into time constant problems.

NONONO

As I said in the first mail, I DON'T want to remove the DC offset
using a cap. I think this point causes many confusions.
My discovery is that when you obtain the PWM wave by thresholding
a saw wave, the actual DC offset is equal to the threshold value.
I use an adder circuit to remove it. NO capacitors and no frequency
dependencies.

regards,

MB